package com.purchase.util;

import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 时间工具类
 *
 * @author ruoyi
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }


    /**
     * 判断当前时间是否在[startTime, endTime]区间，注意时间格式要一致
     *
     * @param nowTime 当前时间
     * @param startTime 开始时间
     * @param endTime 结束时间
     * @return
     * @author jqlin
     */
    public static boolean isEffectiveDate(Date nowTime, Date startTime, Date endTime) {
        if (nowTime.getTime() == startTime.getTime()
                || nowTime.getTime() == endTime.getTime()) {
            return true;
        }

        Calendar date = Calendar.getInstance();
        date.setTime(nowTime);

        Calendar begin = Calendar.getInstance();
        begin.setTime(startTime);

        Calendar end = Calendar.getInstance();
        end.setTime(endTime);

        if (date.after(begin) && date.before(end)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * 根据初始日期推算期望(向前/向后)日期
     * @param initTime
     * 初始日期
     * @param n
     * 向前/向后推算n天
     * @return
     * 推算后的日期
     */
    public static String getCalculateDay2(Object initTime,int n) throws ParseException{
        // 返回推算后的日期
        String calculateDay = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        // 初始日期
        Date initDate = null;
        if (null == initTime)
            initDate = new Date();
        else if (initTime instanceof Date)
            initDate = (Date)initTime;
        else
            initDate = sdf.parse((String)initTime);
        // 转换成距离1970年0时0分的毫秒数
        Long initMilliSeconds = initDate.getTime();
        // 一天代表的毫秒数
        int oneDayTime = 24 * 60 * 60 * 1000;
        initMilliSeconds += oneDayTime * n;
        // 推算出的日期
        Date calculateDate = new Date(initMilliSeconds);
        calculateDay = sdf.format(calculateDate);
        return calculateDay;
    }

    /**
     * 获取当前时间前或者后几天
     * @param day 前或后几天
     * @return
     */
    public static Date getDate(int day){

        //创建日历
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(new Date());
        calendar.add(Calendar.DATE, day);

        return calendar.getTime();
    }

    /**
     * 获取当前时间前或者后几天
     * @param day 前或后几天
     * @return
     */
    public static String getDateStr(int day){

        Date date = getDate(day);

        return parseDateToStr(YYYY_MM_DD,date);
    }

    /**
     * 获取前一月的最后一天
     * @return
     */
    public static Date getPreviousMonthLastDay(){

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.add(Calendar.DATE, -1);
        return calendar.getTime();
    }

    /**
     * 获取某个月的某一天
     * @return  date
     */
    public static Date getDateByMonthAndDate(int month,int day){

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, day);
        calendar.add(Calendar.MONTH, month);

        return calendar.getTime();
    }

    /**
     * 获取某个月的某一天
     * @return String
     */
    public static String getDateStrByMonthAndDate(String format, int month, int day){

        return parseDateToStr(format,getDateByMonthAndDate(month,day));
    }

    /**
     * 时间字符串转秒数
     * @param dateStr   时间字符串
     * @return  long
     */
    public static long dateStrToTime(String dateStr){

        Date date = parseDate(dateStr);
        return date.getTime();
    }

}
